Calcitlator



A. c. MEYER Nov. 1, 1932,

CALCULATOR 4 Sheets-Sheet 1 May 4' 1 o 4 3 I I... v d 4.... 3,. q n 3 *ai A 1U H 3 B 4% 7 m- 6 m l M M a wam a: 4 O m4 l A. C. MEYER Nov. l, 1932.

CALCULATOR Filed May 4, 1926 4 Sheets-Sheet 2 l INVENToR. ALBERT C. MEYEQ BY@ @JWM/M 0 n 4 m n 4 e 3 3 7 .D 1l F m |P|||H|lM .H,/.. fil.; n |.IIIL n llllll l, l I IT THIN ||W o m m .D e q 4 u z 5 ww A TTORNEY A C. MEYER Nov. l, 1932.

CALCULATOR Filed May 4, 1926 4 Sheets-Sheet '5 Nov. 1, 1932.

A. C. MEYER CALCULATOR Filed May 4, 1926 4 Sheets-Sheet 4 STOP ATTORNEY Patented Nov. 1, 1932 ALBERT C. MEYER, OF SAN DIEGO, CALIFORNIA CALCULATOR Application ied May 4,

My invention relates to calculators or calculating machines, more particularly adapted for calculating 1percentages of principals as in computing interest, or iter calculating 5 multiples et certain base i timbers, such as in computing costs and the like.

The objects of my invention are: first, to provide a calculating' machine having a long tape provided with tabulations adapted to be lo Wound in opposite directions on drums by a handle adapted to be rotated in one direction only, thereby preventing the tape from being unuound from one drun'i v'lien not, at th'e same time, Wound on another; second, to

provide a novel n' mechanism and gear shifting' means for connecting the drum rotating handle with one or the other of a pair ot drums upon which a long' tabulation tape is Wound; third, provide novel means ijor changing the comiection of ,f ne operating handle with the tape supporting drums whereby, when the connection is cnanged, the di 'eetion in which Ye tape is to be shifted will be indicat d on the handle or" the shitting means; ieu l, to provide a positive tape stop means vfnereby the tape is prevented from being unwound from either supporting drum Without unnecessary strain on the tape itself; fifth, to provide means in 3o connection with a machine of his class for holding the tape taut all times; sixth, to provide a calculator havingl a tabulation tape mounted on the drum in such a manner that a minimum of Vlriction and tension is applied and exerted on the tape when pas, from one drum to the next; seventh, to provide n'ieans in. cory iection with the drums ot a calculator ot this class for yieldably holding the tape in. al'nement on the drums by yield lo able direction means at the edges of the tape; eighth, to provide a calciilator of this class having a long calculating tape or strip which, oven though the tape or strip shrinks or expands under different Weather' conditions,

Ai5 readings and calculations may nevertheless be made Without taking into consideration the shrinking or expansion of the tape or strip; ninth, to provide a calculator' having a long tabulation strip mounted on drums in a manner to be Wound from one to the other,

192?. Serial No. 106,633.

the supporting frame having indices contiguous to the face of the tape adapted to aline with prominent cliara 'teriaations or indicatimis on. the face or" and extending longitudinally .vith the tape, whereby the drums may :f otater rapidly but still indicate tov the o1 erator the appriiiinate location on the ta. )e of the tabulation desired for a particular calculation; tenth, to provide a calculating means having a tabulation provided with sets eters representing prinet pals and percen'ages thereof or numbers and multiples thereof and a slide in connection with the tabulation, the slide having a portien through which a set or a portion ot a set et the characters or numbers may be viewed; eleventh, to provide a novel spacing-oil' means in connection with the slide or" a calculating means for spacing olil horizontally arranged characters or numbers; twelfth, to provide a calculating means of this class having a triple set of slides mounted over a tabulation so that one ot the slides or the calculation slide may be readily shifted to any portion of the tabulation for calculating interest, percentages, costs and the like; thirteenth, to provide calcula-ting machines having a tabulation provided with a vertical column ot horizontally arranged numbers, the numbers at the left eingoffset relatively to those at the right so that tivo distinct sets of numbers may be provided in close relation on the same tabulation; fourteenth, to provide a calculating' means ot this class having a tabulation of the type mentioned and a slide in connection with and shitta'ble over said tabulation, said slide being provided with a portion for viewng the numbers and also with zeros for eX- rei'l g' he value of the group of numbers at ne side of the column; iitteenth, to provide' a tabulation and slide combination, as mentioned, in which the slide provided with another shiiftable calculating slide uncovering and covering said zeros and for correspondingly increasing and decreasing the value of the group of' numbers at the opposite side of the lcolumn, said latter slide carrying means for spacing ofi" decimals and thousands and millions in the two groups of numbers; siX- pended claims, reference being` had to the ac-' companying drawings and to the characters of reference thereon, which form a part'of this application, in which:

Figure 1 is a top plan view of my calculator in one form of construction, Fig. 2 is a side view thereof, taken from the operating' handle side, with the outer casing broken away and in section to facilitate the illustration; Fig. 3 is a sectional elevational view thereof, taken through 3 3 of Fig. 1; Fig. 4; is a sectional view thereof, taken through ef-l of Fig. 3, showing certain parts and portions thereof broken away and in section to facilitate the illustration; Fig. 5 is an enlarged fragmentary top view of the calculating slide in position over a fragmentary portion of the tabulation tape; Fig. 6 is a fragmentary sectional elevational view thereof, taker through 6%6 of Fig. 5; 7 is a view similar to that of Fig. 5, showing a slightly mcdilied arrangement of the numbers in the tabulation tape and a corresponding modilication in the calculating slide, and Fig. 8 is a frag mentary view of a portion of the tabulation tape for computing interest on principal.

Lilie characters of reference refer to similar parts andportions throughout lthe several views of the drawings.

The supporting frame of my calculator consists essentially of the base member 1, the inner frame 2 and the outer casing 3 enclos-- ing the mechanism and provided at the upper end -with a removable cover 3a having an opening 3?) therein. The inner frame 2 consists of a pair of spaced side plates 2a and 2?) secured to the base member 1 and tied and spaced relatively to each other by a plurality of tie rods 2c. n

On and between the plates 2a and 2?) is revolubly mounted a pair of spaced and axially parallel shafts 1- and 5 on which are mounted, respectively, drums 6 and 7, which drums are secured to their respective shafts. On said shafts and againstthe ends of the drums are positioned tape directing flanges 8, which are yieldably held against the ends of the drums by means of compression springs 9 positioned between said flanges and the plates of the frame 2. Around the drums 6 and i' are wound the opposite ends of the tabula tion or calculation tape 10, which is secured at its ends in any convenient manner to the drums, as shown best in Fig. 3.

The shafts 4 and 5 are held in position on` yhe plates 2a and 2?) of the frame 2 by means of collars 11 at one of their ends and by means of spur gears 12 and 13, respectively, at their opposite ends. Against the outer side of the plate 2?) is positioned'and reciprocally mounted a gear shifting and supporting slide 111, said slide being mount-ed on afpar of brackets 15 at its opposite ends. Said slide is positioned around the shafts il and 5 and between the plate 2?) and gears 12 and 13. Intermediate the ends of the slide 14 is revolubly mounted a large drive gear 16, which is adapted to mesh with either of the gears 22 or 13. Gn the spindle 17, on which the gear 16 is revolubly mounted, is also rcvolubly mounted the drum operating handle 18. At the inner side of the cranlr portion of the handle 13, contiguous to its axis, is pivotally mounted a pawi 19, which is adapted to engage the teeth ofthe ratchet 2O secured to the outer side of the gear 1G around its axis, the pa-wl 19 being forced into engagement with the teeth ot the ra chet by la spring member 21, as shown best in l. Thus, the gear 16 is adapted to be driven in one direction only by the operating handle 18, which direction is in 'that of the arrow shown in Fig. 2. The drive gear 16 is adapted to rotate the gear 12 through an intermediate gear 22 revolubly mounted on the plate 2b of the frame. Thus, when the drive gear 16 is shifted into engagement with either the gear 22 for rotating the gear 12 or'into mesh with the gear 13,.the rolls or drums 6 and 7 are permitted only to wind the tape onto the drums; and at no time'is the tape permitted to be unwound and pile up unless wound on the other drum.

The means for shifting the slide 1,4 consists of a rod 23 rotatably mounted near its opposite ends on the two plates 2a and 2?) of the frame 2, the one end of the rod 23 extending through the pla-tc 2?) bein provided with a crank arm 23al having a pin 23?) at its outer end, which pin is adapted to operate in a transverse slot lele at the outer end of an oit set portion 1a?) at the end of the slide 14;. rlhe opposite end of therod 23 extends through the wall ofthe outer casing 3 and is provided at said end with a handle 24 having a laterally extended wing 2da provided at its opposite sides with arrows 246 directed from the anis of the rod 23. These arrows on the handle 211i indicate the direction in which the tape 1G is adapted to be shifted when the operating handle 18 is rotated. The slide shifting rod 23 is fixed longitudinally by the crank rm 23a engaging the outer side of the plat-e 2b, and by means of a collar 25r engaging the outer side of the other plate. Said collar 25 is flattened at its opposite sides, as shown hest in 3. Against the flattened sides of said collar are positioned the free ends of leaf springs 26 supported by the plate 2a, which leaf springs are adapted to serve as a yield able locking means for holding the gear shifting handle 24 and therefore the slide 14 in its extreme shifted positions.

Gn and between the two plates of the frame 2, near their` rear and lower portions, is revolubly mounted a stop screw 27, which is provided at its one end with a gear 28 adapted to be driven by the gear l2 through an intermediate gear 29, as shown in Figs. 2 and 4. @n the stop screw 27 is mounted a traveling stoo member 30, which is guided and prevented from rotating more than one revolution with the screw 27 by a guide rod', which in this case one of the tie rods of the frame, as shown in Figs. 2 and 4. Near the opposite ends of the screw 2T are providec pairs of lock nuts 3l or any other suitable means for limiting the stop member 3G. Thus, vhen the gear 1G is shifted, shown in Fig. 2, and the handle 18 rotated in he direction of the arrow, the screw 27 will be rotated through the gearing and feed the stop member 30 towards one of the pairs of lock nuts 3l. TvVhe-n the stop member 30 engages the lock nuts, suflicicnt rc tance is applied to the rotation of the handle 18 as to prevent, or at least give sufficient warning to prevent, the handle from being rotated farther so as to prevent the tape lO from being` unwound from the drum Then the gear 1G is t. shifted in mesh with the gear i3 and the hann dle le rotated, the stop member 30 will travel in the opposite direction on the screw and stop the rotation of the handle i3 through the tape itself butin a similar manner.

llfithin the casing 3 and l elow the opening 3?) in the cover 3a thereof is positioned a plate over which the tape is adapted to be drawn. This plate is adjustably supported at its under side and at its lateral ends on a pair of brackets, 33 which are adjustably mounted in a vertical direction on the side plates of the frame 2. nt the forward and rear edges of the plate 32 are revolubly mounted long rollers 34, which are supported at their ends on brackets secured to the under side of the plate 32. The axes of the rollers 34 are parallel with those of the drums 6 and 7, thus permitting the tape to pass freely from one drum, over the rollers 34 and plate 32 onto the other drum, it being noted that the upper portions of the rollers 34 extend slightly above the upper or normally outer suiface of the plate 32.

The plate 32 is also provided with other downwardly extending brackets at the lower ends of which are pivotally mounted one of the ends of auxiliary roller supporting arms 35. These arms are bifurcated at their outer ends and revolubly support between the furcations thereof auxiliary rollers 37.

There are preferably provided four of such auxiliary rollers, two extending forwardly of the foremost roller 34 and two extending backwardly from the rcarmost roller 34. Said auxiliary rollers are yieldably held in engagement with the under side of the tape l() by means of tension springs 38 secured' at one of their ends to a lug 33a on the under side of the plate and at their opposite ends to the arms 36. Thus, the tape is held taut at all times between the drums and on the drums and at the same time always wound straight onto the drums, the latter function being facilitated by the resilient action of the flanges 8 relatively to the ends of the drums.

Over the opening 3b of the outer casing cover 3a is positioned a transparent plate 39, which is secured in position by a rectangular frame 40, which extends preferably over the front and rear edges of the plate only. At the forward and rear sides, or as will be referred to hereafter, the upper and lower sides of the frame 40 are provided transverse channels 40a in which are positioned the upper and lower ends or edges of the rectangularly shaped slide 41 for guiding said slide transversely relatively to the casing and the tabulation on the tape l0. Between and on the lateral side portions 41a of the slide 4l, is reciprocably mounted an other slide 42, which is provided at its upper or outer side with an open portion 42a. The lower portion of the slide 42, which consists preferably of a separate member 43 for retaining the upper portion of the slide 42 on the side portions 41a of the slide 4l, is provided with a pair of openings 43a and 43?) opposite or below the opening 42a. The opening 43a is positioned below and to the left of the opening 43?) and is adapted to per mit the first two digits of the principal on the tabulation of the tape to be seen therethrough, the other opening 43?) being sufficiently long to permit all of the numbers or digits of the corresponding interest of the principal to be seen therethrough. At the upper side of the member 43, is provided a longitudinal channel 430 in which is reciprocably mounted another slide 44, which is also open at its middle portion, as indicated by 44a. The slide 44 is adapted to be driven back and forth or from one side to the other by means of a knob 45 secured to an arm 46 intermediate the ends thereof, which arm is positioned within a backwardly extending bracket portion 426 of the slide 42 and is pivotally mounted at its rear end on a pivot pin 47 within said bracket portion. The forward end of the arm 46 is pivotally con nected to a slotted portion 44o extending upwardly from the slide 44 and backwardly into the bracket portion 42o. The knob 45 extends through an arcuate slot 420 at the upper side of the bracket portion 42?) and is adapted to be shifted to the leftmost position in said slot by a spring member 48 secured to the pivot pin 47 at its one end and connected to the arm 46 at its opposite end, as shown best in Fig. 5.

The tabulations shown on the tape in the drawings are for computing interest ofV principals at various rates. On the tape shown in Figs. l, 5 and 8 are provided two distinct sets of figures or numbers, those at the left of each column consisting of twoy digits, being preferably printed with a different colored ink from the remaining seven digits at the rightside of each column. As shown in Figs. l and 8, the numbers or digits at the left side of each coluinn are offset a whole line below those at the right, therefore, interest of a certain principal will be found above the line of the first two digits representing the principal. Said digits representing the principal may be viewed through the opening 43a in the slide 43. The remaining digits, in the form of zeros, are inscribed or otherwise applied to the slide 43 immediately to the right of the opening 43a, as indicated by 43d, there being shown seven zeros on the slide 43 in Fig. 5 of the drawings. The righthand end of the portion of the opening 44a of the slide 44 opposite the opening 435 of t-he slide 43 extends a greater distance to the right than the portion of rthe opening 44a opposite the opening 43a or the zeros on the slide 43 to make the ends of the interest and principal -suins correspond. On the slide 44 is mounted a plurality of arm 440, 44d, 44e and 44], the former, 440

' and 44d, extending upwardly or forwardly from the lower edge of the opening 44a, and the latter extending downwardly or bachwardly froin the forward edge of said opening. At the end of the arm 440 is-provided an inscription'or indication representing a decimal point between the dollars and cents of the principal suin; this decimal point may be shifted to divide the zeros on the slide 43 as well as the digits on the tape. Ait the ends of the other arms 44d, there being provided one or more, are provided indications representing commas to space od thousands and millions of dollars in the principal sum. At the end of the arm 44e is also provided a periody for indicating the decimal point between the dollars and cents of the interest sum.` At the ends of the other arms 4-lf are provided indications representing commas to space E the thousands and millions in the interest sum. y

Uien it is desired to compute the interest on a certain principal sum at a certain rate, thejhandle 18 is rotated until the proper table of principal and interest is opposite the opening 3?) of the outer casing. The slides 4l and 42 are then shifted so that` the openings 43aY and 430 are over the desired numbe 1s of the table or tabulation. ln Fig. 5 tie tirs-t two digits of the principal sum are 6 and 9, said 'j digits being viewed through the opening 43a.y

The slide 44 is then shifted so that the decimal at the end of the arm 440 spaces olf the proper number of dollars in the principal snm, the principal sum snown inF ig. 5 being $6,900.00. The interest for this sum at 6% for one month will be found to be $034.50. VIf the interest foil $6.90 is desired for the same rate and terni, the slide 44 is shifted to the left until the decimal point at the end of the arm 44q is between the 6 and 9. The decimal point at the end of the arm 44e will be correspondingly shifted to the'left. Thus, the table shows that the interest on $6.90 is $.03. ln order to obtain the interest for $6,969.69 the rate and term, the interest reading is taken as shown. in Fig. 5, and the :interest reading recorded, then the slide is shifted wo spaces to fthe left with he ueciinal pointafter the 9 of $69 and the interest readl f again talren and recorded below the pre i i: reading, then the slide 44 is shifted wo spaces to the left with the decline-.l pci;l of and the reading talen. The'latter readin will show no interest of any value for for one month at 6%. Summing up the c interest for $6,969.69 for one 0 will be found to be $34.84. Any er interest for any other period at any other rate on the tape may be likewise determined.

ln the ino-diiied forni of construction, shown in Fig. i', the whole principal sums are shown alternated with the interest sums in vertical column or in columns. By reason of the change of the principal and intercoinr i spacing olf the thousands and inillions also mounted on the same corresponUA ig bars 447i. The computation'with the latter construction is substantially identical with that previously described,

Although each group of numbers or tabulation 10a, giving the interest on a principal sum a certain rate for a certain period, is designated in large characters l0?) at the right by the period and rate, such indication or characterization or identification cannot be easily read when the operating handle 18 is rotatedat normal speed. To overcome this dii'lculty, there are provided on the lower or upper ledge, or both, of the frame 40, indices indicating rates of interest, such as 2%, 3% and so forth, which are adapted to aline with pefinanen indications 10c, suoli as black ink rulings, which entend longitudinally with the tape between the several groups of lilre tabulations. As shown in the tape in Fig. 8, such permanent indications or rulings are for cerllU tain rates only and correspond with rate indices on the frame 40. It' desired these indices, as Well as the rulings or other indications on the tape, may be for days, months, years, or for any other item desired. Thus, when the handle 18 is rotated at a normal or rapid rate of speed and the black ink ruling 10c is opposite a certain rate index on the frame, such as (5% in Fig. l, it will be known to the operator that the 6% interest group is opposite the opening inthe casing.

Although I have referred to principals, interest, rates of interest and terms of time, it Will be noted t-hat my calculator is applicable for computing costs or adapted tor other similar use; and although I have shown and described a particular construction, combination and arrangement of parts and portions and a certain modification thereof, I do not Wish to be limited to this particular construction, combination and arrangement, but desire to include in the scope of my invention, the construction, combination and arrangement substantially as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a calculating means, a tabulation having a plurality of distinct groups of characters positioned side by side, the characters in a group being arranged in horizontal and vertical lines, a slide reciprocably mounted over said tabulation, and adapted to frame any one Group of characters, a second slide reciprocaIaly mounted on said lirst slide .at right angles to its movement, and movable from end to end of the respective group, and a third slide reciprocably mounted on the second slide in a direction parallel. With the horizontally arranged characters of said respective group.

2. In a calculating means, a tabulation having a plurality ot' distinct groups of characters positioned side by side, the characters in a group being arranged in horizontal and vertical lines, a slide reciprocally mounted over said tabulation and adapted to frame any one group of characters, a second slide reciprocally mounted on said lirst slide at right angles to its movement, and movable from end to end of the respective group, and a third slide reciprocally mounted on the second slide in a direction at right angles to its movement.

3. In a calculating means, a tabulation having vertically and horizontally arranged characters, a slide reciprocally mounted over said tabulation, a second. slide reciprocally mounted on said first slide at right angles to its movement, and a third slide reciprocally mounted on the second slide in a direction parallel with the horizontally arranged characters of said tabulation, said third slide having an open portion through which related characters occupying more than one line of said respective group may be viewed.

4. In a calculating means, a tabulation having vertically and horizontally arranged characters, in which related characters occupy dilferent lines, a slide reciprocally mounted over said tabulation, adapted to frame certain groups of said characters, a second slide reciprocally mounted on said lirst slide at right angles to its movement, and adapten to iframe certain characters of said framed groups and a third slide reciproeaiiy mounted on the second slide in a direction at right angles to its movement, said third slide having an open portion for eX- posing specific related characters occupying said diiierent lines.

5. In a calculating means, a tabulation having vertically and horizontally arranged characters, in which the related characters occupy dilierent lines, a slide reciprocal in a direction parallel with the horizontally arranged characters of said tabulation, means for supporting said slide over any portion of said tabulation, said slide having an open portion exposing speciie portions of said related characters occupying ditferent lines, said slide having also spacing-olil means over said open portion for simultaneously spacing off said specific, related characters.

(i. In a calculating means, atabulation having vertically and horizontally arranged cha acters, in which related characters oecupy different lines, a slide reciprocally mounted over said tabulation, adapted to frame certain groups of said characters, a second slide reciprocally mounted on said iirst slide at right angles to its movement, and adapted to frame certain characters of said framed group, and a third slide reciprocally mounted on the second slide in a direction at right angles to its movement, said third slide having an open portion for exposing specific portions of said related characters occupying different lines, said third slide having also spacing-off means over said open portion for simultaneously spacing off said specific, related. characters.

7. In a calculating means, a tabulation having sets of characters representing certain principals and multiples in ten thereotl and certain percentages thereof, a slide I eciprocally mounted over said tabulation, and another slide reciprocally mounted on said iirst slide, said other slide having an open portion through Which a set or a portion of a set of said characters may be viewed, said other slide having also spacing-ofi means over said open portion for spacing off characters of each set in their correct relation.

S. In a calculating means, a tabulation having sets of characters representing princip-als and percentages thereof, and a slide reciprocally mounted over said tabulation, said slide having a restricted open portion through which a limited set or a limited portion of a set ot' said characters may he viewed, said slide having also spacing-off means over said portion for spacing olif characters yoit cach set.

ln a calculating means, ar tabulation having numbers and multiple thereof, and

slide reciprocally mounted over said tabulation, said slidel having a restricted open portion through which a limited set or limited port-ion of a set of said numbers and multiples thereof may be viewed and also having'spacing-oii' means over said portion spacing oli' numbers ot each set.

l0. In a calculating means, a tabulation having a vertical column ot horizontally arranged numbers, the numbers at the left beingl offset relatively to those at the right, a slide shiftable over said tabulation and provided with an open portion tor viewing said numbers and alsof provided with zeros for VeX- tending the value oi the group 01"' numbers at one of said column, and another slide reciprocally mounted on the first slide :Cor uncoifering and covering said zeros and for correspondingly increasing and decreasing the value of the group ot numbers at the oppositek side of the column.

ll. n `a calculating means, a tabulation laving a vertical column oi horizontally arranged numbers, the numbers at the left being distinguishably ditierent from those at the right and offset relatively to the latter to the next adjacent row of horizontally arranged numbers, a slide shiftable over said tabulation and provided with an open portion Yfor viewing said numbers and also provided with zeros for extending the value oi the group of numbers at one sidel of said column, another slide reciprocally mounted on the iirst slide for uncovering and covering said zeros and for correspondingly increasing and decreasing the value of the group of numbers at the opposite side ot the column, and means in connection with d other slide for spacing off decimals and thousands and millions in said two groups ot numbers.

12. ln a calculating means, a tabulation having a vertical column ot horizontally arranged numbers, the numbers at the lett being offset relatively to those at the right, a slide shi'ftable over said tabulation and provided with an open portion 'for viewing said numbers and also provided with zeros for extending` the value of the group of numbers at one side of said column, another slidereciprocally mounted on the first slide for uncovering and covering said zeros and for correspondingly increasing and decreasing the value ot the group of numbers at the opposite side ot the column, and rmeans in connection with said other slide for spacing oli decimals and thousands and millions in said two groups of numbers.

13. In a calculating means, a tabulation having closely associated superimposed numbers and multiples thereof arranged in single columns, a slide reciprocally mounted over said tabulation, said slide having an enclosed unobstructed portion through which a set orV reciprocally mounted relatively thereto, provided with a plurality of variable shaped openings movable in relative relation with the openings in said first slide, whereby charactersof said tabulation may be segregated into offset relation in their relative horizontal rows oi the characters of said tabulation.

l5. In a calculating means, the combination with a tabulation of a slide provided with an opening therein, and another slide reciprocally mounted relatively thereto, provided with a plurality of variable shaped openings movable in relative relation with the openings in said lirst slide, whereby characters of said tabulation maybe segregated into odset relation in their relative horizontal rows ot the characters of said tabulation, and means for adjusting and shifting one of said slides relatively to the other.

16.` In a calculating means, the combination with a tabulation or' a slide provided with an opening therein, and another slide reciprocally mounted relatively thereto, provided with a plurality of variable shaped openings movable in relative relation with' the openings in said irst slide, whereby characters of said tabulation may be segregated into odset relation in their relativehorizontal rows of the characters of said tabulation, means for adjusting and shifting one of said slides relatively to the other and characters positioned in relation to said openings on one oit said slides forming points of segregation in the rows of ligures on said tabulation.

17. In a calculating means, a tabulation having closely associated groups of characters in vertical and horizontal rows, a slide member provided with an opening centrally therein, adapted to expose a pair of horizontal rows lof said tabulation, and another slide provided with a plurality of openings adapted to be moved into position to be seen through the opening in the iirst mentioned slide, some of said openings being jogged and offset, whereby the characters in the horizontal rows seen through said openings in both ot said slides are varied as to length.

i8. ln a calculating means, aV tabulation having closely associated groups of ycharacters in vertical and horizontal rows, a slide member provided with an opening centrally therein, adapted to expose a pair of horizontal rows lof said tabulation, and another slide provided with a plurality of openings adapted to be moved into position to be seen through the opening in the first mentioned slide, some ot' said openings being jogged and offset, whereby the characters in the horizontal rows seen through said openings in both oit said slides are varied as to length, vertical bars separating the openings in the second mentioned slide and period and Comma means positioned on said vertical bars for designating the character of the points, the characters in the horizontal rows are divided into.

19. In a Calculating means, a tabulation having, closely associated groups of Characters in vertical and horizontal rows, a slide member provided with an opening centrally therein, adapted to expose a pair of horizontal rows of said tabulation, and another slide provided with a plurality of openings adapted to be moved into position to be seen through the opening in the first mentioned slide, some of said openings being ogged and offset, whereby the characters in the hori- Zontal rows seen through said openings in both of said slides are varied as to length, vertical bars separating the openings in the second mentioned slide, and period and oomma means positioned on said vertical bars for designating the character of the points, the characters in the horizontal rows are divided into, and means in connection with both of said slides for adjusting and shifting the relative position of said slides.

In testimony whereof, I have hereunto set my hand at San Diego, California, this 17th day of April 1926.

ALBERT C. MEYER. 

